diff --git a/esphome/components/lvgl/widgets/arc.py b/esphome/components/lvgl/widgets/arc.py
index c037da72ed..65f0e785b6 100644
--- a/esphome/components/lvgl/widgets/arc.py
+++ b/esphome/components/lvgl/widgets/arc.py
@@ -67,13 +67,13 @@ class ArcType(NumberType):
             lv.arc_set_mode(w.obj, literal(config[CONF_MODE]))
             lv.arc_set_change_rate(w.obj, config[CONF_CHANGE_RATE])
 
-        adjustable = config.get(CONF_ADJUSTABLE)
-        if adjustable is False:
-            lv_obj.remove_style(w.obj, nullptr, literal("LV_PART_KNOB"))
-            w.clear_flag("LV_OBJ_FLAG_CLICKABLE")
-        elif adjustable is True and CONF_GROUP not in config:
-            # For some reason arc does not get automatically added to the default group
-            lv.group_add_obj(lv_expr.group_get_default(), w.obj)
+        if CONF_ADJUSTABLE in config:
+            if not config[CONF_ADJUSTABLE]:
+                lv_obj.remove_style(w.obj, nullptr, literal("LV_PART_KNOB"))
+                w.clear_flag("LV_OBJ_FLAG_CLICKABLE")
+            elif CONF_GROUP not in config:
+                # For some reason arc does not get automatically added to the default group
+                lv.group_add_obj(lv_expr.group_get_default(), w.obj)
 
         value = await get_start_value(config)
         if value is not None: